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SSDs will replace ram

hardtofindinthefuture
By hardtofindinthefuture
in Storage Devices
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Posted

SSDs are fast. we all know that.

 

So cant the CPU just pull the data it needs directly from the SSD

Reducing the bottleneck putting the data on RAM

 

 

How it would work

CPU pulls data off SSD

puts in a special folder for later use

Pulls from the folder when needed

 

Pros

Uses the speed of the SSD

Cheaper

Faster?

 

Cons

Writes to the SSD ALOT
bottleneck from SATA

 

What do you think

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4 minutes ago, Electronics Wizardy said:

Noooo.

 

Ram is also much faster

FTFY

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4 minutes ago, Electronics Wizardy said:

Noooo.

 

Ram is also much slower

RAM is about 10-20x faster than an SSD.

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2 minutes ago, TheRandomness said:

RAM is much, much faster. DDR4 can have read speeds of up to 28GB/sec and the data lanes are wired directed to the CPU. On the other hand, SSDs can only manage around 4GB/sec, max..

And the latency with SSDs is far greater iirc.

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Ever wonder why RAM Disk exists?

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Posted

No idea where you got the "SSD's are faster than RAM" idea from.

 

RAM is several times faster any even the fastestt NVMe SSD.

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Posted

OptaneComparison.png

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5 minutes ago, Electronics Wizardy said:

Noooo.

 

Ram is also much slower

 

 

 

 

Wut

 

Haven't you heard of a ram disk? They make SSDs look slow by contrast, just kinda not practical. 

 

Assuming typo lol

 

 

 

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1 minute ago, Mooshi said:

Wut

 

Haven't you heard of a ram disk? They make SSDs look slow by contrast, just kinda not practical. 

 

Assuming typo lol

 

typo oops

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Posted

Even if we lived on a planet on which SSDs were faster than RAM they would still be undesirable on account of their non-volatility. Having the RAM be automatically wiped when power is removed is desirable.

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2 minutes ago, Electronics Wizardy said:

typo oops

:P hence why I didn't reply... I kinda had a feeling :D 

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2 minutes ago, othertomperson said:

Even if we lived on a planet on which SSDs were faster than RAM they would still be undesirable on account of their non-volatility. Having the RAM be automatically wiped when power is removed is desirable.

could you explain why? i can think of a few reasons that involve privacy but maybe im missing some fundamental functionality in this equation?

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Typical PCIe 4x SSD = about 2 GB/s sustained transfer

Dual channel 2133 DDR4 (kinda basic configuration for Skylake or newer) = 34GB/s. Then you can buy faster ram. It can use it.

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1 minute ago, tlink said:

could you explain why? i can think of a few reasons that involve privacy but maybe im missing some fundamental functionality in this equation?

Imagine having some personal data in the RAM that'd be easily accessed upon startup...

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Posted

I could see RAM and cache being consolidated, but secondary storage just has such a different purpose that it doesn't really make sense. It's akin to saying haul trucks can replace Nascars.

"Do as I say, not as I do."

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1 minute ago, TheRandomness said:

Imagine having some personal data in the RAM that'd be easily accessed upon startup...

Someone flat-out just stealing the RAM, and nothing but the RAM.

 

But when it comes to RAM vs SSD. Here's what you can expect from a RAMdisk.

 

kXKmnnv.png

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2 minutes ago, GlassBomb said:

Someone flat-out just stealing the RAM, and nothing but the RAM.

 

But when it comes to RAM vs SSD. Here's what you can expect from a RAMdisk.

 

kXKmnnv.png

Still slower than the actual transfer rates of most RAM nowadays :P

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3 minutes ago, TheRandomness said:

Still slower than the actual transfer rates of most RAM nowadays :P

I suspect that's due to a combination of the extra overhead of writing to a filesystem (be it in RAM or not) vs pure RAM writes, as well as the protocol not being optimized for that kind of memory, just as SSDs use different algorithms than HDDs.

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Posted

SSD tech isnt up to it, RAM is vastly surperior in terms of speeds. in the future then maybe but i doubt that it will be a thing within 4 years

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Posted
29 minutes ago, v0nn_toaster said:

SSDs are fast. we all know that.

 

So cant the CPU just pull the data it needs directly from the SSD

Reducing the bottleneck putting the data on RAM

 

 

How it would work

CPU pulls data off SSD

puts in a special folder for later use

Pulls from the folder when needed

 

Pros

Uses the speed of the SSD

Cheaper

Faster?

 

Cons

Writes to the SSD ALOT
bottleneck from SATA

 

What do you think

you say "faster" (than ram) and then say "bottleneck from SATA." WHAT? SSD's are orders of magnitudes slower the RAM. Maybe when xpoint comes out definitely not at the moment

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